Crusher roll with sectional surface elements



Jam 21, 1947. J. T. FOWLER 2,414,591

CRUSHER ROLL WITH SECTIQNAL SURFACE ELEMENT I Filed July 22, 1945 //v vE/vTo/e 3 JOHN T FOWLER, ,64%

KITTY Patented Jan. 21, 1947 CRUSHER ROLL WITH SECTIONAL SURFACE ELEMENTS John T. Fowler, Columbus, Ohio, 1 assignoni-by mesne assignments, to The Jefirey Manu-facturing Company, a corporation of Ohio Application July .22, 1943, Serial No. 495,721

r 2 Claims.

This invention relates toa crusher. An object of the invention is toprovide a crusher with an improved rotor construction particularly in which simplified and improved means are provided to clamp removable segments to the rotor frame.

Other objects of the invention will appear hereinafter, the novelfeatures and combinations being set forth in the appended claims.

In the accompanying drawing,

Fig. 1 is a side elevational view of a crusher including the structure of my invention, with parts broken away to show one of the rotors;

Fig. 2 is a sectional view taken on the line 2--2 of Fig. 1, looking in the direction of the arrows;

Fig. 3 is an enlarged end view of a segment of the rotor; and

Fig. 4 is a perspective view of one of the clamping thimbles or nuts.

Referring particularly to Fig. 1 of the drawing, it will be seen that the crusher including the features of my invention is a double roll crusher in cluding a main frame I!) upon which a pair of crushing rolls, one of which is seen at II, is mounted, said rolls being driven by flywheels one of which is seen at I2, the flywheels being interconnected by a driving belt I3 reeved about pulleys so as to drive the two rolls in opposite directions as indicated by the arrows.

It is to be understood that the roll or rotor of my invention may be employed with other type crushers, such as single roll crushers.

The structure of the rotor or roll I I is best seen by reference to Fig. 2 of the drawing, and includes a shaft M upon which a frame I5 is mounted and keyed for rotation therewith. The frame I5 is preferably in the form of a heavy casting generally in the shape of a cylinder having hubs at opposite ends which are keyed to the shaft I4. The outer surface of the roll or rotor I I is provided by a plurality of removable cylindrical segments E6, the surfaces of which may be provided with teeth to assist in the crushing action. As illustrated in the drawing, there are four segments it which form the entire cylindrical surface of the rotor or roll I I. The number of such segments is optional.

Each segment I6 includes a pair of spaced radially inwardly extending wings or flanges I1 which extend along opposite sides of the frame I5. Adjacent their bottoms each of the wings or flanges I! has an opening II! which is generally frusto-conical in shape but is modified by the provision of a communicating slot or groove I9 at the bottom or inner side thereof so that a keyhole type opening is formed in the bottom or innerside of each wing. I Adjacent theinner cylindrical surface of each segment 16 is a rib 20 which extends. into a groove 2| formed in the frame 15 torassist in properly aliningthe segment IS on thelframe I5.

. Extending through alined openings in therotor frame .I5 isatie bolt 22 for each segment It, said tie bolt preferably being provided with a cotter pin 23 extending through a hole therein adjacent one end of it to prevent rotation of the tie bolt 22 by abutting a wall of the frame I5. The frame I5 is provided with spaced openings 24 sufliciently large for a person to extend his hand therethrough to gain access to the interior of frame I5.

The opposite ends of the tie bolt 22 are screwthreaded to receive similar removable nuts or threaded thimbles 25, the function of each of which is to act as a clamping means in co-operation with the bearing surface in the bottom or inner portion of each opening I8 to clamp the segment I6 on to the rotor frame I5 by pulling it radially toward the axis of the shaft I4. Each of said nuts or thimbles 25 is threaded on the interior thereof and is provided with a frustoconical wedging portion 26 and a cylindrical end portion 21. The outer end is provided with a wrench receiving head 28.

Assuming that a, segment I6 is separate from the frame I5 and is to be attached and clamped in position, the operation will be as follows. The nuts or thimbles 25 will be removed from the opposite ends of the tie rod 22. The segment IE will be set on the rotor frame I5 and the slots or grooves l9 permit radial movement of said segment IE so that the ends of tie bolt 22 pass through said slots or grooves I9 into the openings IS. The rib 20 will fit into the groove 2| to assist in proper alinement of segment I6. Axial alinement of the segment I6 with respect to the frame I5 is provided by the co-operation between the inner faces of the wings or flanges I1 and the adjacent outer surface of the frame I5.

The nuts or thimbles 25 are then preferably simultaneously or successively threaded on to the opposite ends of the tie bolt 22 and since the tie bolt 22 is along an axis which is parallel with the axis of the rotor I4, as the frusto conical surfaces 26 of the thimbles or nuts 25 contact with the lower bearing surfaces of the openings I8 as the nuts or thimbles 25 are screwed home, a wedging action takes place therebetween to force segment I6 radially against the outer periphery of the rotor frame I5 and thus clamp said segment securely in place.

The cylindrical portions 21 of the thimbles or nuts 25 may extend into cylindrical recesses 29 adjacent the alined holes in the rotor frame [5 which receive tie bolt 22. To remove a segment IE it is only necessary to remove the thimbles or nuts 25, whereupon the segment may be freely removed radially from the rotor frame l5.

It is to be noted that the rotor construction which I have provided, employs a minimum of parts and when disassembled there are no small parts such as small nuts, yvashers, cotter keys and the like, to become lost, since only the thimbles or nuts 25 are removed.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claims hereto appended, and I therefore wish not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of my invention, what I desire to secure by Letters Patent of the United States is:

1. A rotor including a frame, a removable segment having radially extending wings on oppo-. site sides of said frame, aligned holes in said wings having bottom opening slots to extend over a tie bolt, a tie bolt extending through said frame and through both of said holes, the aforesaid frame.

2. A rotor including a frame, a removable segment having radially extending wings on opposite sides of said frame, aligned holes in said wings having bottom opening slots to extend over a tie bolt, a tie bolt extending through said frame and through both of said holes, the aforesaid slots providing for radial movement of said segment toward the axis of said rotor by providing free movement of opposite ends of said tie bolt into said aligned holes, and a tapered nut threaded on at least one end of said tie bolt and adjustable along the tie bolt to effect a progressive radial clamping action between said segment and frame as said nut is fed toward said frame.

JOHN T. FOWLER. 

